leg site hole age mnemonic auxiliary age mnemonic top of section depth(m) bottom of section depth(m) special condition age auxiliary age averaged age age top of section(million years) age bottom of section(million years) average age(million years)t data source 15 149 RECENT 0.0 1.0 NO AGE GIVEN NO AGE GIVEN 0 0.011 .0055 DSDP INITIAL REPORTS 15 149 PLEISTOCENE 1.0 41.5 NO AGE GIVEN NO AGE GIVEN 0.011 1.8 .9055 DSDP INITIAL REPORTS 15 149 UPPER PLIOCENE 41.5 46.0 NO AGE GIVEN NO AGE GIVEN 1.8 3.4 2.6 DSDP INITIAL REPORTS 15 149 PLEISTOCENE 46.0 53.5 A LEGITIMATE AGE INVERSION NO AGE GIVEN NO AGE GIVEN 0.011 1.8 .9055 DSDP INITIAL REPORTS 15 149 MIDDLE PLIOCENE 53.5 55.5 NO AGE GIVEN NO AGE GIVEN 3 4 3.5 DSDP INITIAL REPORTS 15 149 TERTIARY 56.0 93.0 NO AGE GIVEN NO AGE GIVEN 1.8 65 33.4 DSDP INITIAL REPORTS 15 149 UPPER MIOCENE 93.0 114.2 NO AGE GIVEN NO AGE GIVEN 5 10.5 7.75 DSDP INITIAL REPORTS 15 149 MIDDLE MIOCENE 114.2 145.0 NO AGE GIVEN NO AGE GIVEN 10.5 16 13.25 DSDP INITIAL REPORTS 15 149 LOWER MIOCENE 145.0 217.5 NO AGE GIVEN NO AGE GIVEN 16 22.5 19.25 DSDP INITIAL REPORTS 15 149 UPPER OLIGOCENE 223.0 251.0 NO AGE GIVEN NO AGE GIVEN 22.5 30 26.25 DSDP INITIAL REPORTS 15 149 MIDDLE OLIGOCENE 251.0 270.0 NO AGE GIVEN NO AGE GIVEN 29 32 30.5 DSDP INITIAL REPORTS 15 149 UPPER EOCENE 270.0 283.5 NO AGE GIVEN NO AGE GIVEN 37.5 43 40.25 DSDP INITIAL REPORTS 15 149 MIDDLE EOCENE 283.5 390.0 NO AGE GIVEN NO AGE GIVEN 43 49 46 DSDP INITIAL REPORTS